FMJ yaw and upset performance

[stanc]

I am interesting in promoting the idea of a long-range intermediate military cartridge capable of replacing both 5.56mm and 7.62mm NATO rounds.

The problem is, I have read in a British report that in a gel test by Alexander Arms of an FMJ bullet fired from a Grendel case, it did not start to yaw until after penetrating several inches, which is not good enough.

So I really have a two-part question here:

1. Is it possible to design a low-drag 6.5mm FMJ bullet of around 120-125 grains which exhibits rapid and reliable yaw and upset on impact?

2. Is it possible to achieve the same performance using a lead-free bullet, since that seems to be a growing military requirement?

Tony, I should've asked this earlier. I know that on your website you show some photoshopped pics of possible 6.5, 6.8 and 7mm cartridges. Does item 1 above mean that you've settled on 6.5mm? Are you planning to create one or more "wildcat" cartridges to do load development and terminal effectiveness tests? If so, do you intend to have custom bullets made for you?

FWIW, in addition to the 120gr 6.5mm FMJ, Norma also shows a 130gr .270 FMJ and 150gr 7mm FMJ.
http://www.norma.cc/content.asp?Typ=28&L...Components